import Foundation import KeychainAccess enum APIError : Error { case accessTokenExpired case networkError // Add more error cases as needed } class APIManager { private let keychain = Keychain (service: "com.example.app.refreshToken" ) private let refreshTokenKey = "refreshToken" private var accessToken: String ? func callAPI < T : Codable >( urlString : String , method : String , parameters : [ String : Any ] ? , completion : @escaping ( Result < T , APIError >) -> Void ) { guard let url = URL (string: urlString) else { completion(.failure(.networkError)) return } var request = URLRequest (url: url) request.httpMethod = method // Add access token to the request headers if available if let token = accessToken { request.setValue( "Bearer \(token) " , forHTTPHeaderField: "Aut...
A Short Example call Rest Api with JSON Foundation framework NSURLSession and NSJSONSerialization - Getting Started - Basic Rest API request with Swift 4 func restApiRequest(){ let sessionConfig = URLSessionConfiguration.default // Session Configuration let sessionUrl = URLSession(configuration: sessionConfig) // Load configuration into Session let url = URL(string: "YOUR URL STRING")! let task = sessionUrl.dataTask(with: url, completionHandler: { (data, response, error) in if error != nil { print(error!.localizedDescription) } else { do { ...